Method of manufacturing environment-friendly packaging material for food

ABSTRACT

A method of manufacturing environment-friendly packaging material for food is disclosed. Solid-state material such as recycled fibrous husk materials including paddy husk, wheat husk, wood powder, milk powder and clay are employed to mix with water, oil, surface-active agent, pulp slurry so as to form into a fluidized material. After that, aqueous adhesive is employed and stirred with the above mixture via processes of continuing feed supplying, stirring, squeezing, and pressing, drying and coating with glue until a waterproof and hygienic packaging material is obtained.

BACKGROUND OF THE INVENTION

[0001] (a) Field of the Invention

[0002] The present invention relates to a method of manufacturing environment-friendly packaging material, and in particular, to a method of manufacturing packaging material to contain food by employing vegetative fibrous husk material to mix with water, edible oil, surface active agents, milk powder, pulp slurry, clay so as to form into a fluidized material.

[0003] (b) Description of the Prior Art

[0004] Conventional environment-friendly packaging material for the packaging of food is normally paper material made from pulp slurry. After the packaging material has been used, the material is recycled for re-processing or burnt which does not pollute the environment. However, the pulp slurry is obtained from lumbering and this process is considered damage to environment. Besides, the manufacturing processes require the incorporation of additives and these steps are relatively expensive. Accordingly, it is imperatively that the inventor has designed a method of manufacturing environment-friendly packaging material for food, which employs cheap raw materials, and the manufacturing processes are simple. The method has mitigated the drawbacks of the conventional manufacturing method of environment-friendly packaging material.

SUMMARY OF THE INVENTION

[0005] Accordingly, it is an object of the present invention to provide a method of manufacturing environment-friendly package material, wherein recycled fibrous husk materials such as paddy husk, wheat husk, wood powder, milk powder and clay are employed to mix with water, oil, surface active agent, pulp slurry so as to form fluidized material. After that, aqueous adhesive is employed and stirred with the above mixture via the processes of continuing feed supplying, stirring, squeezing, and pressing, drying and coating with glue until a waterproof and hygienic packaging material is obtained.

[0006] Yet another object of the present invention is to provide a method of manufacturing environment-friendly packaging material for food, wherein the process to obtain the packaging material is simple and cheap.

[0007] The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

[0008] Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]FIG. 1 is a flowchart showing the process of manufacturing environment-friendly packaging material for food in accordance with the present invention.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0010] The following descriptions are of exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

[0011] Referring to FIG. 1, there is shown a process of manufacturing environment-friendly packaging material. The essential materials are divided into solid-state raw material 10, fluidized secondary material 11 and liquid state adhesive 12. These materials are mixed to form edible package. In accordance with the present invention, the solid state raw material includes fibrous material, wheat husk, wheat flour, wood powder, hay, and clay, milk powder, PVA, zinc stearic acid, CaCO3, etc. After these materials are ground until fine block of size mesh number 60 is obtained. The percentage of solid state material 10 is about 45 to 60%, wherein the vegetative material is about 22-29%, and the remaining, for instance clay, being 9.5 to 11.5%, white mud being between 4.5 to 6%, or calcium carbonate being 13 to 21.5% are ground to form powder and are stored in container. These materials are mixed at interval, wherein these materials are added and mixed in solid-state raw material 10. In the preparation of fluidized secondary material 11, the paper pulp is added with water, edible oil, minute amount of surface active agents being 0.08 to 0.2%, benzoic acid, milk powder, clay powder being mixed, and the solid state raw material 10 and the fluidized secondary material 11 are respectively placed into the container with first stirring mixing 13. The stirring speed is 300 rpm and the materials are mixed until a semi-wet material is obtained.

[0012] Water, PVA and a small amount of milk powder are mixed to form aqueous adhesive 12 and are then directly placed into the semi-wet product to proceed with second time mixing 14. At this stage, a slower speed of stirring is employed, for instance, at about 20 rpm such that the entire food package material has achieved the state fully mixed paste. This is the material for manufacturing the package.

[0013] The above material is directly placed into the storage tank to form storage material preparation 20. By way of quantitative control, the material is placed to a squeezing device to press into a prefabricated material 21. This material 21 is placed onto a guiding roller to proceed with the process of rolling-pressuring formation 22 so as to obtain plate-like material of appropriate thickness. The product is dried at 140° C. in the first plate-like material oven-drying process 23. The dried material is then coated with glue in the glue coating process 24. An atomizing of adhesion of coated layer is employed to achieve single layer water treatment. This process causes the surface layer to form into a waterproof thin film. The product is undergone a second oven-drying process 25. At this stage, hot air at the temperature of 120° C. is employed to dry the glue-coated layer to form a waterproof layer. That is, the entire food package product 26 is obtained. The product 26 can be rolled up and can be proceeded to a tailoring process 27 to form into a specific size.

[0014] In accordance with the present invention, the material that employed is low cost, and simple mixing and stirring processes are employed so as to achieve the objective for forming a food package.

[0015] It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

[0016] While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention. 

I claim:
 1. A method of manufacturing environment-friendly packaging material comprising the steps of: (a) preparing of materials including a solid state material, a fluidized secondary material and liquid state adhesive, wherein the solid state materials include vegetative fibrous material, paddy husk, wheat husk, wheat flour, wood powder, hay and stalks and leaves of plant, and clay, milk powder, polyvinyl alcohol (PVA), Zinc Stearic Acid, Calcium Carbonate being of fine size with screen number of 60, the entire solid state material is about 45 to 60% of the total weight, the vegetative material is between 22 to 29%, the remaining, such as clay is between 9.5 to 11.5%, white mud is between 4.5 to 6% or the calcium carbonate is between 13 to 21.5%, being ground to powder for mixing at interval with the solid state material, the fluidized secondary material is a mixture of pulp slurry added with either water, edible oil, minute amount of surface active agents occupying 0.08 to 0.2% and benzoic acid, milk powder, and minute amount of clay, and the liquid state adhesive is a preparation containing water, PVA and a minute amount of milk powder; (b) mixing and stirring the solid state adhesive with the main material and the semi-furnished product of the secondary material containing in a tank; (c) stirring slowly until a paste is obtained; and (d) squeezing, pressing, and oven-drying and coating with glue the material obtained in step (d) until a complete food packaging material is formed.
 2. The method of claim 1, wherein the stirring speed in the stirring step is below 300 rpm.
 3. The method of claim 1, wherein the temperature of oven drying is at 140 deg C.
 4. The method of claim 1, wherein the temperature of oven drying after coated with glue is at 120 deg C. 